File handle

ABSTRACT

A longitudinal shaft having projections on each end thereof extending downward and inward toward each other for gripping the side wall of the end portions of a hollow file, a bolt inserted therethrough at one end thereof, a handle attached thereto at one end thereof, one of the projections and the handle having a longitudinal slot in which the bolt is inserted for adjustment of the handle and adjustment of the projection to grip the end of the file, and vertical extensions extending from both surfaces of the shaft to prevent unwanted side slippage and twisting of the adjustable handle and projection.

Umted States Patent 1151 3,656,216 Coon et al. [45] Apr. 18, 1972 541FILE HANDLE 2,645,002 7/1953 Dailey et a1 ..29/80 2,839,817 6/1958Huxtable et al ..29/80 [72] James 929 Drew street 3,531,841 10/1970McCord,Jr ..29/78 Sacramento, Calif. 95691; Elwin Theobald, 4631 SolanoWay, Fair Oaks,

Cam 9 5628 Primary Examiner-Harrison L. Hinson Attorney-Alexander B.Bla1r [73] Assignee: said Coon, by said Theobald 22 Filed: July 10, 1970[571 ABSTRACT 21 A N 53 889 A longitudinal shaft having projections oneach end thereof 1 pp 0 extending downward and inward toward each otherfor gripping the side wall of the end portions of a hollow file, a [52]U.S.Cl ..29/80 bolt inserted therethrough at one end h f a handle [51]'f Cl "823d 71/04 tached thereto at one end thereof, one of theprojections and [58] Fleld of Search ..29/78.80 the handle having alongitudinal Slot in which the bolt is 56 R f Ci d serted for adjustmentof the handle and adjustment of the pro- 1 e erences te jection to gripthe end of the file, and vertical extensions ex- UNITED STATES PATENTStending from both surfaces of the shaft to prevent unwanted 1 714 5145/1929 Manoy 29/80 s de shppage and tw1st1ng of the ad ustable handleand PIOJEC- on 2,193,400 3/1940 Fore ..29/80 2,547,484 4/ 1951 Murdachet al ..29/80 6 Claims, 12 Drawing Figures CII T 3 46/ 26 [Z2PATENTEDAPR 18 1912 i ww x m a E m w WK N @GR a ,0 S WWW RM R QN QQ I 'MA FIJPHN \H "I" AM I 5/ N NQ 5% NN $5 K $6 G w mm m Q.

Nm E k TIWENE)? FILE HANDLE This invention relates to a handle forhollow files. The primary object of this invention is to provide ahandle whereby a hollow file may be utilized with a maximum ofefficiency.

. attaching the handle to the hollow file solely by gripping the fileteeth.

The above and other objects of this invention will become apparent tothose skilled in the art after a consideration of the following detaileddescription of the preferred embodiments of this invention takentogether with the accompanying drawing wherein:

FIG. 1 is a plan view of the handle;

FIG. 2 is an elevational view thereof;

FIG. 3 is a sectional view thereof taken on line 3-3 of FIG.

FIGS. 3A and 3B show different types of hollow files to which the handleof FIG. 2 may be attached;

FIG. 4 is a sectional view taken on line 44 of FIG. 2;

FIG. 5 is a sectional view taken on line 5-5 of FIG. 2;

FIG. 6 is a crosssectional view of an embodiment wherein the handle isattached to the teeth of the hollow file;

FIG. 7 is a sectional view taken on line 7-7 of FIG. 6;

FIG. 8 shows the embodiment of FIG. 6 wherein the handle is attached tothe file by means of the hole formed by the bent tooth rather thangripping the tooth itself as shown in FIG. 6;

. FIG. 9 is a variation of the handle of FIGS. 1 and 2; and FIG. 10 isanother variation thereof.

Referring in detail to the drawing, there is illustrated in FIGS. 1 and2 a handle attached to a shaft 22 gripping a hollow file 24 shown indotted outline. Fixed to the bottom surface of shaft 22 at one endthereof is a U-shaped projection 26 having an upper leg 28 welded orotherwise attached to the bottom surface of shaft 22 and a lower andshorter leg 30. On the other end of shaft 22 is a U-shaped projection 32having an upper leg 34 slidably attached to the bottom surface of shaft22, the lower and shorter leg 36, and a third leg 38 at the end of leg36 extending downward therefrom and transverse with legs 34 and 36.Shaft 22 has a hole 40 through which a bolt 42 is inserted. Projection32 has a longitudinal slot 44 in leg 34 through which bolt 42 is alsoinserted. Handle 20, which is shown with a knurled section 46 atthecurved end 48, has a straight end 50 having a longitudinal slot 52open at the end of straight end 50. Bolt 42 is also inserted throughslot 52 for slidably attaching handle 20 to the top surface of shaft 22.A wing nut 54 allows handle 20 and projection 32 to be adjusted whenloosened and fixes them in place when tightened. A pair of extensions56, shown bent upward from shaft 22, and a pair of downward extensions58 form a guide for and prevent unwanted slippage and twisting of handle20 and projection 32 should wing nut 54 loosen while file 24 is beingused.

As clearly shown in FIG. 3, the end of side 60 of file 24 fits betweenand is held in place by means of legs 28 and of projection 26. The otherend of side 60 fits between and is held in place by means of legs 34 and36 of projection 32. Projection 32 is slidably moved along slot 34 inorder to accommodate various length files. When hollow file 24 is to beremoved from shaft 22, wing nut 54 is simply loosened and projection 32is moved outward so that leg 38 is beyond the end of hollow file 24. Ifhollow file 24 is to be removed quickly and if there is not sufficienttime to loosen the wing nut for removal, projection 32 may be made of anappropriate springtype material allowing the user to put his fingerwithin file 24 to press leg 38 out of the file 24 as shown by the dottedoutline so that file 24 may be quickly and easily removed and anotherfile quickly inserted in minimum same manner in a minimum of time. Thisquick way of removing and replacing a file is even more simplified whenleg 38 extends out from side 60 on the outside of hollow file 24 in asituation where shaft 22 is within hollow file 24, as shown in FIG. 3A,rather than outside as is the case in FIG. 3. FIG. 3B illusu'ates one ofthe many shaped hollow files for which this invention is adapted.

FIGS. 6-8 show another embodiment for attaching a hollow file to shaft22. A crow bar shaped projection 72 is attached to the bottom of shaft22 in the same manner as projection 26. The curved end of projection 72curves downward from shaft 22 and has a notch 74 at the end thereofforming portions 76 and 78 on each side of the notch which easily slipover two or three file teeth 80 that extend up from the surface ofhollow file 70. In this manner hollow file 70 may be attached to shaft22 by hooking the curved end portions 76 and 78 over file teeth 80 suchas those illustrated in FIGS. 1-3 of US. Pat. No. 3,389,447, dated June25, 1968. As already described in connection with FIG. 3A, projection 72may hook onto hollow file 70 with shaft 22 being within hollow file 70rather than outside thereof as shown in FIG. 8, the curved end ofprojection 72 slipping between clearance 82.

If it is desired to use the hollow file such as one might use a scrubbrush, it is only necessary to loosen wing nut 54 in order to raisestraight end 50 above extensions 56 so that handle 20 may be swungaround 180 to be put in the dotted line position as shown in FIG. 2.

A variation of handle 20 is shown in FIG. 9 having a rounded hand gripportion 90, centered along the mid-longitudinal axis of straight end 50,rather than curved end 48 of FIG. 2. It should be noted that portion mayhave a small diameter for insertion in any chuck or holding colletnormally used on file machines wherein the workpiece is pushed upagainst the file which merely moves in a straight line up and down.

FIG. 10 shows another variation of handle 20 which can be used inconjunction with various types of shafts such as reciprocal type saws,jig saws, etc. Hole 92 and cut out 94 correspond to the configurationrequired for inserting end 96 in the tool jaw or receptacle. Slotted end98 is shown with reduced portions 100 for proper fitting betweenextensions 56. The handle of FIG. 10 will fit the holding collet of afile machine in a manner which is even an improvement over the handle ofFIG. 9.

While the preferred embodiments have been illustrated and described, itwill be apparent to those skilled in the art that modifications andchanges may be resorted to without departing from the spirit and scopeof the invention.

We claim:

1. A hollow file holder, comprising a shaft, a hooked projection securedto the bottom of said shaft at one end thereof, a second hookedprojection slidably attached to the bottom of said shaft at the otherend thereof, a handle slidably attached to the top of said shaft at saidother end thereof, means connected to said shaft and said secondprojection and said handle for alternatively securing said secondprojection and said handle in a fixed position and allowing longitudinalmovement of said second projection and said handle and rotationalmovement of said handle, said projections adapted to receive and hook onto the end portions of a side of a hollow file which is to be held, saidmeans allowing said projections to firmly grip various length hollowfiles.

2. The hollow file holder of claim ll, wherein said projections areU-shaped, the legs of said projections being parallel with the bottomsurface of said shaft, and the legs of said pro- 5 5 jections extendingtoward each other.

3. The hollow file holder of claim 2, including a leg extending downwardbelow said shaft and attached at the end of the lower leg of said secondprojection, and wherein said second projection and said downwardextending leg IS comprised of a spring-like material allowing the hollowfile to be replaced by another hollow file in a minimum of time withoutthe use of said means.

4. The hollow file holder of claim 1, wherein said projections areshaped in the form of a crow bar with the straight portions thereofbeing secured to said shaft and the curved ends thereof extendingdownward and toward each other, the curved ends thereof hooking onto andgripping the file teeth jutting from the surface of the hollow file andentering the clearance holes formed by the jutting file teeth of thehollow file in the alternative for firmly holding the hollow file tosaid shaft with said shaft respectively being positioned outside thehollow file and inside the hollow file in the alternative.

5. The hollow file holder of claim 1, wherein said second projection hasa longitudinal slot in the portion thereof attached to the bottom ofsaid shaft and wherein said handle has a longitudinal slot at one endthereof, the slot being open at one end thereof; and including a boltinserted through said slots of said second projection and said handleand inserted through said shaft, a wing nut threadedly engaged with saidbolt at the top surface of said handle, a pair of extensions extendingvertically upward from said shaft adjacent the sides of said handle, anda pair of extensions extending downward from said shaft adjacent thesides of the portion of said second projection attached to the bottom ofsaid shaft.

6. The hollow file holder of claim 5, wherein the other end of saidhandle is shaped to be inserted in the tool jaw of a file machine and ahand tool in the alternative and to be held manually in the alternative.

1. A hollow file holder, comprising a shaft, a hooked projection securedto the bottom of said shaft at one end thereof, a second hookedprojection slidably attached to the bottom of said shaft at the otherend thereof, a handle slidably attached to the top of said shaft at saidother end thereof, means connected to said shaft and said secondprojection and said handle for alternatively securing said secondprojection and said handle in a fixed position and allowing longitudinalmovement of said second projection and said handle and rotationalmovement of said handle, said projections adapted to receive and hook onto the end portions of a side of a hollow file which is to be held, saidmeans allowing said projections to firmly grip various length hollowfiles.
 2. The hollow file holder of claim 1, wherein said projectionsare U-shaped, the legs of said projections being parallel with thebottom surface of said shaft, and the legs of said projections extendingtoward each other.
 3. The hollow file holder of claim 2, including a legextending downward below said shaft and attached at the end of the lowerleg of said second projection, and wherein said second projection andsaid downward extending leg is comprised of a spring-like materialallowing the hollow file to be replaced by another hollow file in aminimum of time without the use of said means.
 4. The hollow file holderof claim 1, wherein said projections are shaped in the form of a crowbar with the straight portions thereof being secured to said shaft andthe curved ends thereof extending downward and toward each other, thecurved ends thereof hooking onto and gripping the file teeth juttingfrom the surface of the hollow file and entering the clearance holesformed by the jutting file teeth of the hollow file in the alternativefor firmly holding the hollow file to said shaft with said shaftrespectively being positioned outside the hollow file and inside thehollow file in the alternative.
 5. The hollow file holder of claim 1,wherein said second projection has a longitudinal slot in the portionthereof attached to the bottom of said shaft and wherein said handle hasa longitudinal slot at one end thereof, the slot being open at one endthereof; and including a bolt inserted through said slots of said secondprojection and said handle and inserted through said shaft, a wing nutthreadedly engaged with said bolt at the top surface of said handle, apair of extensions extending vertically upward from said shaft adjacentthe sides of said handle, and a pair of extensions extending downwardfrom said shaft adjacent the sides of the portion of said secondprojection attached to the bottom of said shaft.
 6. The hollow fileholder of claim 5, wherein the other end of said handle is shaped to beinserted in the tool jaw of a file machine and a hand tool in thealternative and to be held manually in the alternative.